Track shoe



Dec. 30, 1930.

\N. TURNBULL TRACK SHOE 2 sheets-sheet 1 l Filed 'June 8,A 1927 Y @Q NN Dec. 30, 1930.

w. TURNBULI.

TRACK SHOE Filed June 8, 1927 2 Sheets-Sheet 2 Patented Dec. 30, 1930A uNrrEn STATES 'PATENT OFI-lcsv4 WILLIAM TURNBULL, lOI' PEORIA, ILLINOIS, ASSIGNOY T0 CATIiJRLEII-LLAR TRACTOR CO.,

0F SAN LEANDRO, CALIFORNIA, A CORPORATION OF CALIFORNIA TRACK SHOE Application nea :mie s,A 1927. semi No. 197,325.

vide a track shoe which has a large ground ven aging surface but is lightfin weight.

claim, may

y invention possesses other advanta. geous features, some of which with the foregoing, will be set forth at length in the following description where I shall outline in full that form of the track shoe of my invention, which I have selected for illustration in' thefdrawings accompanying and forming part of thepresent specification. In said drawin s I have shown one form of track shoe em odying my invention, but it is'to be understood that I do not limit myselfto such form since the invention as set forth in the be embodied in a plurality of forms. A

In the drawings:

Fig. 1 is a plan ofthe track shoe of my invention as seen from above.

Fig. 2 is a transverse sectionof the track shoe of my invention, the plane of section being indicated by line 22 Kof Fig. 1.

Fig. 3 is a side elevation of the track shoe of my invention as it is used in connection with a vehicle track and with an attached grouser.

Fig. 4 is a cross section of the track shoe of-myv invention, the plane of section being indicated by line 4-4 of Fig. 1. p

Fig. 5 is a cross section of the trackv shoe of my invention, the plane of section being indicated by line 5 5 of Fig. 1; n

Y The track shoe of my invention preferably comprises an integral body including recesses for the attachment of anauxiliary shoe or grouser and having projections thereon adapted to interrelate with similar projections on adjacent track shoes to provide a substantially continuous tread.

The track vto which my track shoe is preferably attached, usually comprises a link (l connected to similar links thru bushings( and track pins 8.v Each link includes a flange 9 on its lower surface. The iange 9 is apertured for the reception vof suitable bolts and nuts 11 for attaching track shoes to the links.

Preferably, the track shoe of my invention comprises an integral body of metal preferably cast or drop forged and is roughly rectangular in plan. It also is relatively thin in height and preferably is included between two parallel planes. A plate 12 of a thickness considerably less than the thickness between the planes has its lower face coincident withl the lower of the two planes, preferably, and extends for substantially the entire breadth and width of the track shoe. plates are a pair of bosses 13'situated equi- -distantly from the longitudinal center line about which the track shoe is symmetrical. Each boss is provided with a central aperture 14 for the reception of bolts 11 and also is rovided with a countersunk depression 16 for the reception of the bolt head. The upper surface ofeach boss preferably coincides with the upper plane so that the bosses ex tend entirely between the two planes. second pair of bosses 17 is provided on the plate 12 but the centers of these second bosses are preferably spaced. farther apart than are the centers of the first bosses 13. The bosses 17 are likewise provided with apertures 18 for the reception of bolts 11 and are likewise countersunk.

AEach* lateral edge of the plate 12 is indented to form a recess 1,9 for the accommodation of the fastening means# 20 of auxiliary track shoes or grousers. To aid in increasingl the strength of the track shoe and to give it the necessary rigidity, a wall 21 is pro vided which rims the entire plate 12.,A The wall is upstanding from the plateandextends `substantially entirely between` the upperfand lower planes. It iares outwardly somewhat and follows closely the contour of the plat, forming continuations of the recesses 19. The wall adjacent the recesses 19 is situated at an angle to the plane of plate 12 and is terminated in a plane perpendicular to the plane of the walls of the recesses 19 for the Formed on the Y til) proper accommodation of the auxiliary track shoe fastening means. For reenforcement,

suitable webs 22 join the Walls adjacent the recess 19 to bosses 13 and 17 while Webs 23 5 join the bosses in longitudinal pairs.

A transverse flange 24 projects from one edge of the plate 12 and merges With the Wall 21. The upper surface of the flange coincides preferably with the upper plane and 10 the thickness of the flange is preferably come parable to the thickness of plate 12 so that the lower surface ofthe flange is spaced a considerable distance from the lower plane. Adapted to underlie the flange -24 on an ad- 1;, jacent track shoe, is a lip 26 projecting from the opposite side of plate 12 and merging with the wall 21. The lip coincides with neither the upper nor the lower plane but preferably is slightly spaced from the over- 20 hanging flange on the adjacent track shoe.

The thickness of the lip is also preferably comparable to the thickness of the plate 12 and the lip extends transversely for substantially the entire width of the track shoe.

Vith a track shoe of my invention attached to track link '6, there is provided a ground engaging surface 27 of considerable area 'so that the weight of the vehicle is well distributed and also by the provisionof recesses 19 2 there is furnished a means of attaching auX- iliary track shoes or grousers for special purposes. The flanges 24 together with the lip 26 form interengaging projections on the successive track shoes and provide a substantially continuous track while the relatively thin plate 12v permits a considerable amount of metal to be saved and a relatively low weight.

I claim:

As an article of manufacture, a track shoe comprising an integral structure including a substantially flat, rectangular plate having lateral recesses therein, a side wall bounding said plate and also bounding said recesses and providing inclined seats adjacent said recesses, a flange spaced from said plate and merging with one portion of said side wall throughout the length of said track shoe, a lip spaced from said plate and merging with the o posite portion of said side wall throng out the length of said track shoe, said lip being arranged to overlap the flange of an adjacent, similar track shoe, two pairs of apertured bosses upstanding from said plate, the bosses of each of said pairs being unequal- 1y spaced from an adjacent vone of said recesses, and webs extending between the bosses of each of said pairs and between eachof the bosses of each of said pairs and the wall bounding the adjacent one of said recesses.

In testimony whereof, I have hereunto set my hand.

y WILLIAM TURNBULL. 

